Fixed Leo Locus examples

Restored interrupt to leo_locus examples, since this is required for
locus logging to work.

examples/leo_locus_dumpbasic/leo_locus_dumpbasic.ino

@@ -36,10 +36,11 @@ HardwareSerial mySerial = Serial1;
 
 void setup()  
 {    
+//  while (!Serial);  // Leonardo will wait till serial connects
+
   // connect at 115200 so we can read the GPS fast enuf and
   // also spit it out
   Serial.begin(115200);
-  delay(2000);
   Serial.println("Adafruit GPS logging start test!");
 
   // 9600 NMEA is the default baud rate for MTK - some use 4800
@@ -58,8 +59,16 @@ void setup()
 
 void loop()                     // run over and over again
 {  
+  // If using hardware serial (e.g. Arduino Mega), change this to Serial1, etc.
   if (mySerial.available()) {
-    Serial.write(mySerial.read());  
+    char c = mySerial.read();
+    if (c) {
+#ifdef UDR0
+      UDR0 = c;  
+#else
+      Serial.print(c);
+#endif
+    }
   }
 }
 

examples/leo_locus_erase/leo_locus_erase.ino

@@ -32,19 +32,33 @@
 Adafruit_GPS GPS(&Serial1);
 HardwareSerial mySerial = Serial1;
 
+// Set GPSECHO to 'false' to turn off echoing the GPS data to the Serial console
+// Set to 'true' if you want to debug and listen to the raw GPS sentences
+#define GPSECHO  false
+
+// this keeps track of whether we're using the interrupt
+// off by default!
+boolean usingInterrupt = false;
+void useInterrupt(boolean); // Func prototype keeps Arduino 0023 happy
+
 void setup()  
 {    
+  while (!Serial) ;  //wait for serial port on Leonardo
+  
   // connect at 115200 so we can read the GPS fast enuf and
   // also spit it out
   Serial.begin(115200);
-  delay(2000);
   Serial.println("Adafruit GPS erase FLASH!");
 
   // 9600 NMEA is the default baud rate for MTK
   GPS.begin(9600);
   
   GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_OFF);
-  
+
+  // the nice thing about this code is you can have a timer0 interrupt go off
+  // every 1 millisecond, and read data from the GPS for you. that makes the
+  // loop code a heck of a lot easier!
+  useInterrupt(true);
 
   Serial.println("This code will ERASE the data log stored in the FLASH - Permanently!");
   Serial.print("Are you sure you want to do this? [Y/N]: ");
@@ -62,3 +76,34 @@ void loop()                     // run over and over again
   }
 }
 
+/******************************************************************/
+// Interrupt is called once a millisecond, looks for any new GPS data, and stores it
+SIGNAL(TIMER0_COMPA_vect) {
+  char c = GPS.read();
+  // if you want to debug, this is a good time to do it!
+  if (GPSECHO && c) {
+#ifdef UDR0
+    UDR0 = c;  
+    // writing direct to UDR0 is much much faster than Serial.print 
+    // but only one character can be written at a time. 
+#else
+    Serial.write(c);
+#endif
+  }
+}
+
+void useInterrupt(boolean v) {
+  if (v) {
+    // Timer0 is already used for millis() - we'll just interrupt somewhere
+    // in the middle and call the "Compare A" function above
+    OCR0A = 0xAF;
+    TIMSK0 |= _BV(OCIE0A);
+    usingInterrupt = true;
+  } else {
+    // do not call the interrupt function COMPA anymore
+    TIMSK0 &= ~_BV(OCIE0A);
+    usingInterrupt = false;
+  }
+}
+
+

examples/leo_locus_status/leo_locus_status.ino

@@ -38,12 +38,18 @@ HardwareSerial mySerial = Serial1;
 // Set to 'true' if you want to debug and listen to the raw GPS sentences
 #define GPSECHO  false
 
+// this keeps track of whether we're using the interrupt
+// off by default!
+boolean usingInterrupt = false;
+void useInterrupt(boolean); // Func prototype keeps Arduino 0023 happy
+
 void setup()  
 {    
+  while (!Serial);  // the Leonardo will 'wait' until the USB plug is connected
+
   // connect at 115200 so we can read the GPS fast enuf and
   // also spit it out
   Serial.begin(115200);
-  delay(5000);
   Serial.println("Adafruit GPS logging start test!");
 
   // 9600 NMEA is the default baud rate for MTK - some use 4800
@@ -55,6 +61,11 @@ void setup()
   // Default is 1 Hz update rate
   GPS.sendCommand(PMTK_SET_NMEA_UPDATE_1HZ);
 
+  // the nice thing about this code is you can have a timer0 interrupt go off
+  // every 1 millisecond, and read data from the GPS for you. that makes the
+  // loop code a heck of a lot easier!
+  useInterrupt(true);
+
   while (true) {
     Serial.print("Starting logging....");
     if (GPS.LOCUS_StartLogger()) {
@@ -110,4 +121,35 @@ void loop()                     // run over and over again
 }//loop
 
 
+/******************************************************************/
+// Interrupt is called once a millisecond, looks for any new GPS data, and stores it
+SIGNAL(TIMER0_COMPA_vect) {
+  char c = GPS.read();
+  // if you want to debug, this is a good time to do it!
+  if (GPSECHO && c) {
+#ifdef UDR0
+    UDR0 = c;  
+    // writing direct to UDR0 is much much faster than Serial.print 
+    // but only one character can be written at a time. 
+#endif
+  }
+}
+
+
+void useInterrupt(boolean v) {
+  if (v) {
+    // Timer0 is already used for millis() - we'll just interrupt somewhere
+    // in the middle and call the "Compare A" function above
+    OCR0A = 0xAF;
+    TIMSK0 |= _BV(OCIE0A);
+    usingInterrupt = true;
+  } else {
+    // do not call the interrupt function COMPA anymore
+    TIMSK0 &= ~_BV(OCIE0A);
+    usingInterrupt = false;
+  }
+}
+
+
+